Added Printjobs

internal/platepdf/composite.go

@@ -13,6 +13,20 @@ const renderDPI = 300
 // BuildCompositeSVG assembles a plate-sized SVG by embedding each item as a PNG
 // rendered by rsvg-convert (identical to the standalone item file).
 func BuildCompositeSVG(plate model.Plate, spec model.ItemSpec, itemSVG []byte, preview model.LayoutPreview) ([]byte, error) {
+	slotSVGs := make([][]byte, len(preview.Positions))
+	for i := range preview.Positions {
+		slotSVGs[i] = itemSVG
+	}
+	return BuildCompositeSVGSlots(plate, spec, slotSVGs, preview)
+}
+
+// BuildCompositeSVGSlots places one rendered item PNG per layout position.
+// len(slotSVGs) must equal len(preview.Positions).
+func BuildCompositeSVGSlots(plate model.Plate, spec model.ItemSpec, slotSVGs [][]byte, preview model.LayoutPreview) ([]byte, error) {
+	if len(slotSVGs) != len(preview.Positions) {
+		return nil, fmt.Errorf("slot svg count %d does not match positions %d", len(slotSVGs), len(preview.Positions))
+	}
+
 	canvasW := preview.CanvasWidthMM
 	canvasH := preview.CanvasHeightMM
 	if canvasW <= 0 || canvasH <= 0 {
@@ -20,11 +34,14 @@ func BuildCompositeSVG(plate model.Plate, spec model.ItemSpec, itemSVG []byte, p
 		canvasH = spec.CanvasHeightMM()
 	}
 
-	itemPNG, err := svgToPNGViaRsvg(itemSVG, renderDPI)
-	if err != nil {
-		return nil, fmt.Errorf("render item: %w", err)
+	slotPNGs := make([]string, len(slotSVGs))
+	for i, svg := range slotSVGs {
+		itemPNG, err := svgToPNGViaRsvg(svg, renderDPI)
+		if err != nil {
+			return nil, fmt.Errorf("render item slot %d: %w", i, err)
+		}
+		slotPNGs[i] = base64.StdEncoding.EncodeToString(itemPNG)
 	}
-	itemB64 := base64.StdEncoding.EncodeToString(itemPNG)
 
 	var b bytes.Buffer
 	fmt.Fprintf(&b, `<?xml version="1.0" encoding="UTF-8"?>
@@ -37,10 +54,10 @@ func BuildCompositeSVG(plate model.Plate, spec model.ItemSpec, itemSVG []byte, p
 		preview.PrintableXMM, preview.PrintableYMM, preview.PrintableWMM, preview.PrintableHMM,
 	)
 
-	for _, pos := range preview.Positions {
+	for i, pos := range preview.Positions {
 		fmt.Fprintf(&b,
 			`<image x="%.4f" y="%.4f" width="%.4f" height="%.4f" href="data:image/png;base64,%s"/>`,
-			pos.XMM, pos.YMM, canvasW, canvasH, itemB64,
+			pos.XMM, pos.YMM, canvasW, canvasH, slotPNGs[i],
 		)
 	}
 

internal/platepdf/platepdf.go

@@ -30,3 +30,20 @@ func Generate(plate model.Plate, spec model.ItemSpec, itemSVGPath string, previe
 	}
 	return pdf, nil
 }
+
+// GenerateWithSlots builds a PDF with a distinct item SVG per layout slot.
+// Requires rsvg-convert on PATH.
+func GenerateWithSlots(plate model.Plate, spec model.ItemSpec, slotSVGs [][]byte, preview model.LayoutPreview) ([]byte, error) {
+	if !rsvgAvailable() {
+		return nil, fmt.Errorf("rsvg-convert not found in PATH (required for PDF export)")
+	}
+	composite, err := BuildCompositeSVGSlots(plate, spec, slotSVGs, preview)
+	if err != nil {
+		return nil, err
+	}
+	pdf, err := svgToPDFViaRsvg(composite, plate.WidthMM, plate.HeightMM)
+	if err != nil {
+		return nil, fmt.Errorf("render plate pdf: %w", err)
+	}
+	return pdf, nil
+}

internal/platepdf/platepdf_test.go

@@ -64,7 +64,12 @@ func TestBuildCompositeSVG(t *testing.T) {
 func TestBuildCompositeSVGInvalid(t *testing.T) {
 	requireRsvg(t)
 
-	_, err := BuildCompositeSVG(model.Plate{}, model.ItemSpec{}, []byte("not svg"), model.LayoutPreview{})
+	preview := model.LayoutPreview{
+		Positions:      []model.LayoutPosition{{XMM: 0, YMM: 0}},
+		CanvasWidthMM:  10,
+		CanvasHeightMM: 10,
+	}
+	_, err := BuildCompositeSVG(model.Plate{}, model.ItemSpec{WidthMM: 10, HeightMM: 10}, []byte("not svg"), preview)
 	if err == nil {
 		t.Fatal("expected error for invalid svg")
 	}